574308domain: NAppears in sequencesNumbers n such that sigma(n) = 11*phi(n) (where sigma=A000203, phi=A000010).at n=17A171257Numbers k, not powers of primes, for which A011772(k) divides A344875(k), and for all proper divisors d of k, A011772(d) < A011772(k).at n=40A344694